Sub-freezing weather helmet



FIG. 1 is a front perspective view of a sub-freezing weather helmet showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is an elevational view from the opposite side of FIG. 2;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

An ornamental design for a sub-freezing weather helmet, as shown and described. 